Eric is incorrect because since the numbers he rounded 28 and 48 to are greater than 28 and 48 the answer to 28*48 will be less than the answer to 30*50 was.
30*50 = 1500
28*48 = 1344
Hope that helps!! :D
-2 + (-2) = -4
answer is -2
The solutions would be like this for this specific problem. Please refer to the attachment below.
I am hoping that these answers have satisfied your queries and it will be able to help you in your endeavors, and if you would like, feel free to ask another question.
Do u mean d?
1.5d +3.25 = 1 +2.25d
3.25 = 1 + .75d -1.5d on both sides
2.25 = .75d subtraction 1 on both sides
3 = d divide both sides by .75
Recall that for
, we have

Replace
with
and we get

Lastly, multiply this by
, so that
